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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 301 to 310 of 687 (0.008 seconds)| 301 |
Radioiodine dosimetry in the management of differentiated thyroid cancerIfad, D. R. Masud January 2008 (has links)
No description available.
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| 302 |
Rapid Dynamic Contrast-Enhanced M.R.I. using Reduced k-Space and Constrained Reconstruction for the Characterization of Liver TumoursWhite, Mark James January 2007 (has links)
The aim of this work was to improve liver tumour characterization using dynamic contrast-enhanced MRI, where the liver is imaged rapidly following the injection of a paramagnetic contrast agent. Such dynamic studies can provide useful information about hepatic blood flow. However, they remain a practical challenge due to the competing requirements of spatial and temporal resolution needed to characterize briefly-enhancing arterial structures while retaining adequate coverage. Dynamic data can be acquired rapidly using reduced central k-space sampling, where spatial resolution is sacrificed for speed during some parts of the acquisition and high-resolution reference scans are acquired separately. Several constrained reconstruction algorithms that incorporate this additional reference data were evaluated, focussing on variants of Data Replacement Technique (DRT) and Generalized Series (GS) reconstruction. Novel methods using adaptive filtering and mixed enhancement models, potentially appropriate for liver imaging, were also developed. Reconstructions of various types of enhancement were evaluated using numerical simulations and twelve dynamic liver studies acquired from three patients with colorectal liver metastases. Quantitative comparisons are presented. The liver moves both within and between breath-holds. Experimental data was used to assess these variations, and a simple, robust, fast method of motion correction based on tracking the location of the diaphragm was implemented and tested. This approach was then incorporated into constrained reconstruction. A novel methodology for mapping the Hepatic Perfusion Index from dynamic MR data was implemented. It was applied to twenty-five further dynamic liver studies, acquired from patients with liver metastases and controls with normal liver function.
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| 303 |
Evaluation of intensity modulated radiotherapy in head and neck and pelvic malignanciesUrbano, Maria Teresa Guerrero January 2008 (has links)
No description available.
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| 304 |
Development, implementation and early clinical testing of complex conformal radiotherapy in the radical treatment of non-small cell lung cancerPanakis, Niki January 2008 (has links)
No description available.
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| 305 |
Design of an energy optimised radiotherapy verification systemRoberts, David Anthony January 2009 (has links)
No description available.
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| 306 |
Molecular mechanisms of late normal tissue radiation injury : a study in human breastWestbury, Charlotte Beth January 2008 (has links)
No description available.
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| 307 |
Optimization of intensity modulated radiotherapy in head and neck cancerBhide, Shreeang Arvind January 2009 (has links)
No description available.
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| 308 |
Backscatter ultrasound readout of radiation-sensitive gels for radiation dosimetryCrescenti, Remo Andrea January 2009 (has links)
No description available.
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| 309 |
Clinical evaluation of tissue vascular properties using dynamic contrast enhanced magnetic resonance imaging in patients with liver metastasesMiyazaki, Keiko January 2009 (has links)
No description available.
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| 310 |
The Design and Optimisation of Novel Collimators for IMRTAnderson, J. W. January 2009 (has links)
No description available.
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